Hello everyone, thanks for taking the time to help me. We all know how frustrating it is when our head is full of ideas bursting to get out, only to be blocked by something that we can't get to work. Anyway, I looked at all your suggestions, and tried lots of stuff. I changed to run as Administrator, and installed Coyote. Now, I'm happy to say, I can export as wav to my desktop. I have Switch so no problem changing wav to mp3. Maybe I can also export from BIAB as mp3, but that's for another day.
So, thanks again, be assured your help was much appreciated.